Ecology Pulse Check#4

What does pH measure?

• the amount of hydrogen (H⁺) ions

• the amount of hydroxide (OH^-) ions

• amount of water

• all of the above

Which of the following is the strongest acid?

• 1

• 5

• 3

• 8

What is a mixture of chemicals that react with a base/acid to keep pH in a particular range?

• catalyst

• enzyme

• water

• buffer

A pH of 3 is how many times more acidic than a pH of 5?

• 2

• 20

• 10

• 100

A(n) ______ is a substance with a pH less than 7

• Acid
• Alkaline
• Base
• Buffer

A(n) _______ is a substance with a pH greater than 7.

• Base
• Acid
• Buffer
• Water

What is the only substance with a neutral pH of 7?

• Milk

• Orange Juice

• Pure Water

• Blood

What is precipitation?

• Sweat from our bodies on hot days

• Warm rain but not cold snow or sleet

• Gas that we use in furnaces or ovens

• Any form of water that falls from the sky

Tags

NGSS.MS-ESS2-4

NGSS.MS-ESS2-1

What is another name or synonym for the water cycle?

• Geologic cycle

• Hydrologic cycle

• Geosphere

• Carbon cycle

Tags

NGSS.MS-ESS2-4

The act of turning from a gas into a liquid. ________________________

• Condensation

• Evaporation

• Transpiration

• Precipitation

Tags

NGSS.MS-ESS2-4

NGSS.MS-PS1-4